... , coated SS/Al-N-Al/Cu layer 2 47*1500mm, normal capacity 6L/T 3 eco-friendly ... MaterialHigh Borosilicate 3.3 GlassExternal Pipe Diameter & Thicknessdia.=47±0.5mm &=1.6mm, dia.=58±0.5mm ... & Thicknessdia.=37±0.5mm &=1.6mm, dia.=47±0.5mm &=1.6mm,Pipe Length1500mm,1800mmAbsorptive Coating PropertyStructureCu ... Preset Water TemperatureH≤3.7 MJ/ m²(dia.47)Average Heat Loss CoefficientUlt=0.4~0.6W/( ...